Characterization of frequency drift of sampled-grating DBR laser module under direct modulation
Anandarajah, Prince M.ORCID: 0000-0001-7335-8044, Maher, Robert D.ORCID: 0000-0001-9611-1845, Barry, Liam P.ORCID: 0000-0001-8366-4790, Kaszubowska-Anandarajah, AleksandraORCID: 0000-0003-4811-9273, Connolly, Eoin M., Farrell, Tom and McDonald, David
(2008)
Characterization of frequency drift of sampled-grating DBR laser module under direct modulation.
IEEE Photonics Technology Letters, 20
(2).
pp. 72-74.
ISSN 1041-1135
The authors demonstrate the drift in frequency of a static sampled-grating distributed Bragg reflector (SG DBR) laser module when it is subjected to direct modulation. The magnitude of drift and its settling time is characterized as a function of the index of modulation. Results show that when the directly modulated SG DBR is optically filtered, as in a dense wavelength- division- multiplexed system, a power penalty of 6.7 dB is incurred in comparison to the unfiltered case.